Whatawonder!They'vefinished________30%ofthetaskwithinaweek.A.nomor

What a wonder! They've finished ________ 30% of the task within a week.A.no more thanB.no less thanC.not more thanD.much less than

B解析根据句意“真是个奇迹！在一个星期里他们至少完成了百分之三十的任务”，其中的“至少”应该用no less than，表示“不比……少；至少”．现将易混词组作简要小结： at least = at the least = no fewer than = no less than至少；无论如何 at most = at the most = no more than 最多
①no more than“仅仅；只有；只不过”，含有强烈的感情色彩，表示说话者主观上认为“少”．反义： no leas than“有……之多”，=as many/ much as②not more than = less than“不到；少于”，是客观陈述，无感情色彩.

这个问题的回答的对